Anti-spam Connection Protection
Spam email is detected at the early stage of email filtering through Anti-spam Connection Protection which occurs during TCP/IP connection. Detected spam emails are dropped.
IP and/or Domain-based Connection Protection
The sender's server is checked for IP and/or Domain validity. It is also checked against external databases of spam server lists. It is checked with the following filters:
- Realtime Blackhole list
- DNS reverse lookup
- IP reverse lookup
- Sender Policy Framework
Heuristic Connection Control
The heuristic connection protection filter enables Europa to automatically reject a connection from a sender's server when, within a given time interval, the occurrence of a number of harmful conditions is detected from that server. These conditions include the following:
- Unknown recipients
- Virus email
- Spam email
Information is collected during connection time and it is used to check with Europa's local Knowledge Base to avoid hazardous email reception. Administrators can configure the threshold and the duration of occurrences.
Connection Protection Administration Policy
Allows Administrators to specify a maximum connection time and a maximum email size to avoid DoS attacks and large, resource-hungry emails.
|
Anti-virus
The Anti-virus service consists of an Anti-virus Engine which obtains virus signatures from an external database. Update frequency can be configured from 1 to 8 hours. Recommended update frequency is 4 hours.
Emails are scanned with the Anti-virus Engine: questionable emails are quarantined; high scoring spam emails are dropped.
Anti-spam
This service scans an incoming email using various email filters and generates a spam rating/score for that email. The spam rating is then used to determine whether the email will pass through the filters, be quarantined, or be dropped.
Bayesian Analysis
This filter evaluates the header and content of an incoming email message to determine the probability that it constitutes spam.
SURBL Support
SURBL (Spam URI Realtime Blocklists) helps in identifying potential spam based on message body URIs.
Keyword Filtering Policy
Enables Administrators to define a list of keywords as blacklist or whitelist. Incoming emails are evaluated against the blacklist to determine if they are spam or whitelist to determine if they are legitimate emails.
|
Personalized Spam Management
The Personalized Spam Management service provides a user-defined filter mechanism for spam emails. It is a multi-level filter based on user-defined blacklists and whitelists. These blacklists and whitelists are organized in a tree structure with the domain level filter situated at the top of the tree. Departments, groups, sub-departments and sub-groups are in branches, and the end users are at the leaves.
Scanning Company Tree Filter (click image to enlarge)
An email, whether ham (legitimate email) or spam, passes through the filter tree from the recipient (leaf nodes) to the top. If the sender email ID of an email matches with one of the multi-level defined filtering rules, i.e. the blacklist, the email is blocked and quarantined; thus the matching process is finished immediately. If there are no matches in the filtering rules, the matching process exits at the top of the tree. This email is then delivered to the recipient's email account. Similarly, this logic is applied to the whitelist filtering rule. Whenever an email ID is matched on the whitelist, the matching process exits immediately, and the email is delivered to the recipient's email account without any further filtering.
|
Europa Email Processing
(Click image to enlarge)
|
|
Email Server
The Email Server service allows Europa to be your fail-over redundant email server or your primary email server. Europa interfaces with the LDAP server; mailboxes and passwords are synchronized with all users on the LDAP server.
This service supports both POP3s and IMAPs. It has a web-based email client that uses https for security purposes. It also supports Microsoft Outlook and other email clients.
|
Top |
 |
|
